This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A068289 #9 May 03 2012 16:56:35 %S A068289 1,576,16777728,24714188421120,1841036276621803037184, %T A068289 6935553434442856919411660285952, %U A068289 1321303788659476737000614691012213371920896,12729959462391097361772684882480600791246770039196989440,6202319628516337592369784708824005819049596658116953675819712797024768 %N A068289 1/10 the number of colorings of an n X n staggered hexagonal array with 10 colors. %C A068289 Terms for rhombic- and staggered- hexagonal arrays are the same for n in 1..4. %Y A068289 Cf. A068239-A068305, A000332, A002417, A027441, A212194, A212195. %K A068289 nonn %O A068289 1,2 %A A068289 _R. H. Hardin_, Feb 24 2002 %E A068289 a(6)-a(9) from _Alois P. Heinz_, May 03 2012